'use strict'

const { some } = require('min-dash')

const ALLOWED_TYPES = {
  FailedJobRetryTimeCycle: ['bpmn:StartEvent', 'bpmn:BoundaryEvent', 'bpmn:IntermediateCatchEvent', 'bpmn:Activity'],
  Connector: ['bpmn:EndEvent', 'bpmn:IntermediateThrowEvent'],
  Field: ['bpmn:EndEvent', 'bpmn:IntermediateThrowEvent']
}

function is (element, type) {
  return element && typeof element.$instanceOf === 'function' && element.$instanceOf(type)
}

function exists (element) {
  return element && element.length
}

function includesType (collection, type) {
  return (
    exists(collection) &&
    some(collection, (element) => {
      return is(element, type)
    })
  )
}

function anyType (element, types) {
  return some(types, (type) => {
    return is(element, type)
  })
}

function isAllowed (propName, propDescriptor, newElement) {
  const { name } = propDescriptor
  const types = ALLOWED_TYPES[name.replace(/activiti:/, '')]

  return name === propName && anyType(newElement, types)
}

function ActivitiModdleExtension (eventBus) {
  eventBus.on(
    'property.clone',
    function (context) {
      const { newElement } = context
      const propDescriptor = context.propertyDescriptor

      this.canCloneProperty(newElement, propDescriptor)
    },
    this
  )
}

ActivitiModdleExtension.$inject = ['eventBus']

// eslint-disable-next-line consistent-return
ActivitiModdleExtension.prototype.canCloneProperty = function (newElement, propDescriptor) {
  if (isAllowed('activiti:FailedJobRetryTimeCycle', propDescriptor, newElement)) {
    return (
      includesType(newElement.eventDefinitions, 'bpmn:TimerEventDefinition') ||
      includesType(newElement.eventDefinitions, 'bpmn:SignalEventDefinition') ||
      is(newElement.loopCharacteristics, 'bpmn:MultiInstanceLoopCharacteristics')
    )
  }

  if (isAllowed('activiti:Connector', propDescriptor, newElement)) {
    return includesType(newElement.eventDefinitions, 'bpmn:MessageEventDefinition')
  }

  if (isAllowed('activiti:Field', propDescriptor, newElement)) {
    return includesType(newElement.eventDefinitions, 'bpmn:MessageEventDefinition')
  }
}

module.exports = ActivitiModdleExtension
